单项选择题
A.be green in color B.have an even number C.be left to port when entering from seaward D.be cylindrical in shape
A mid-channel buoy，if lighted，will show a（）.A.fixed red...
单项选择题A mid-channel buoy，if lighted，will show a（）.
A.fixed red light B.Morse (A) white light C.green light D.flashing red light
A line on the Earth parallel to the equator is a（）.A.gn...
单项选择题A line on the Earth parallel to the equator is a（）.
A.gnomonic curve B.small circle C.meridian D.great circle
A line of position formed by sighting two charted objec...
单项选择题A line of position formed by sighting two charted objects in line is called a(n)（）.
A.relative bearing B.range line C.track line D.estimated position
